Trumpet.



D. A. MCDONALD.

TRUMPET.

APPLICATION FILED DEC-1.1916.

Patented J an. 21, 1919.

DAVID A. MCDONALD, OF CHICAGO, ILLINOIS.

TRUMPET.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application filed December 1, 1916. Serial No. 134,230.

To all whom it may concern:

Be it known that 1, DAVID A. MoDoNALD, a citizen of the United States of America, and resident of Chicago, Cook county, Illinois, have invented a certain new and useful Improvement in Trumpets, of which the following is a specification.

My invention relates to an improvement in trumpets or similar valved windv instruments, and has for its object the provision of an improved instrument which can be readily tuned to various keys.

By my invention I have provided a very simple and efiicient arrangement whereby the key of the instrument can be readily changed and this is accomplished by the use of a minimum number of parts which can be readily attached to and detached from said instrument and is fulthermore accomplished without further complicating the instrument and without adding any additional twists Or turns to the tubing.

These and other features and objects of my invention will be more readily understood by having reference to the accompanying drawings in which I have illustrated one embodiment of my invention.

Figure 1 is a side elevation of my improved instrument showingthe shorter U- section connected to the instrument and showing in dotted lines one of the parallel tube sections connected thereto.

Fig. 2 is a detailed view of a portion of Fig. 1 showing the longer U-section connected to the instrument.

Fig. 3 is a detailed view of the shorter parallel tube section and one of the U-sections.

F iga is a detailed view of the longer parallel tube section and one of the U-sections.

As illustrated, I have shown a trumpet comprising the usual mouth piece 5 and bell 6 connected by a. system of tubing passing through and controlled by the usual valves 7. Intermediate the mouth piece 5 a'nd' the first valve 7 the tubing consists of two straight sections 8 and 9 which are connected together by means of a slide. This slide consists of two U-shaped sections 10 and 11 telescoping within the ends of the sections 8 and 9 respectively, the inner arms of these U-shaped sections being secured together by the connecting member 12. Telescoping within the inner ends of the U- sections 10 and 11 there is a U -slide 13.

lVith this arrangement of the tubing, the instrument would be in a certain keysay in the key of B-fiat. If the musician wishes to alter the pitch of the instrument, he substitutes for the short U-slide 13, the longer U-slide 14, shown in Fig. 2. The arms of this slide 14- are longer than those of the slide and increase the length of the tubing suiiiciently to lower the pitch of the instrument from what is known as high pitch to what is known as low pitch. If, however, he wishes to lower the key of the instrument from B-flat to A, ing out the slide which telescopes within the sections 8 and 9, and consists of the two U- sections 10 and 11. Now, in order to still further lower the key of the instrument, the musician has but to remove the U-slide 13 and substitute therefor the shorter parallel tube section 15, shown in Fig. 3 and as indicated in dotted lines in Fig. 1. The U- slide 13 is then inserted in the end or" this parallel tube section, as clearly shown in the drawings. Such substitution would lower the key of the instrument to the key of G, and then by drawing out the U-slide, consisting of the sections 10 and 11, the key can be lowered a still further half tone to that of F-sharp. Again the slight change required to alter the pitch of the instrument can be brought about by substituting the longer U-slide 14 for the short U-slide 13. If the musician wishes to have the instrument in a still lower key, say that of F, he then employs the longer parallel tube section 16 in place of the shorter parallel tube 15, and when the instrument is thus arranged a still further lowering of the key can be brought about by the pulling out of the U- slides 10 and 11, as previously described.

With such arrangement I obtain practically a chromatic trumpetthat is, one which can be placed in any key. It will be seen that I am enabled to obtain this change of key without unduly complicating the tubing of the instrument and withoutadding thereto any additional twists or turns. It is merely necessary, with my construction, to provide one or more parallel tube sections which, as above pointed out, can be employed in combination with either of the two U-slides 13 and 14. By having the sections readily removable and by obtaining the change in key by substituting one section for another in the manner above described, I avoid the objection of having the this can be done by drawextending from said tubing of the instrument rendered unduly comphcated and cumbersome. At all times my improved trumpet is graceful in appear-' and modifications may be made without departing from the spirit of my invention.

What I claim as my invention is:

1. A trumpet comprising a bell, a mouthpiece, a valve casing, a. section of tublng mouth-piece, a second section of tubing extending substantially parallel to said first section of tubing and entering said casing, and a third section of tubing comprising two parallel tubes lo cated between said first and second sections of tubing, the end of each of said tubes toward the bell being joined to the corresponding end of the adjacent first and second sections of tubing respectively by U- bends or crooks, the opposite ends of said parallel tubes terminating in the space intermediate the valve casing and said bell, and a removable U-tube joining the inner ends of said parallel tubes.

'2. A trumpet comprising a bell, a mouthpiece, a valve casing, a section of tubing extending from said mouth-piece, a second section of tubing extending substantially v parallel to said first section of tubing and entering said casing, and a. third section of tubing comprising two parallel tubes located between said first and second sections of tubing, the end of each of said' tubes toward the bell being joined to the corresponding end of the adjacent first and second sections of tubing respectively by U-bends or crooks, the opposite ends of said parallel tubes terminating in the space intermediate the valve casing and said bell, a removable U-tube joining the inner ends of said parallel tubes, and an elongated parallel tube section adapted to be substituted Copies of this patent may be obtained for for said U-tube for lowering the key of the instrument, said U-tube being adapted to telescope within the open ends of said substituted section.

3. A trumpet comprising a bell, a mouthpiece, a valve casing, a section of tubing extending from said mouth-piece, a second section of tubing extending substantially parallel to said first section of tubing and entering said casing, and a third section of tubing comprising two parallel tubes lo cated between said first and second sections of tubing, the end of each of said tubes toward the bell being joined to the corresponding end of the adjacent first and second sections of tubing respectively by U- bends or crooks, the opposite ends of said parallel tubes terminating in the space in termediate the valve casing and said bell, a plurality of removable U-tubes of different len be any one of which is adapted for use in joining the inner ends of said parallel tubes, and one or more elongated tube sections any one of which is adapted to be substituted for said U-tubes for lowering the key of the instrument, said U-tubes being adapted to telescope within the open ends of the substituted elongated sections.

4. A trumpet comprising a bell, a mouthpiece, a valve casing, a section of tubing extending from said mouth-piece, a second section of tubing extending substantially parallel to said first section of tubing and entering said casing, and a third section of tubing comprising two parallel tubes, the end of each of said tubes toward the bell being connected to the adjacent end of the first and second sections of tubing respectively by U-bends or crooks, a plurality of removable U-tubes of different lengths any one of which is adapted for use in joining the inner ends of said parallel tubes, and one or more elongated tube sections any one of which is adapted to be substituted for said U-tubes for lowering the key of the instrument, said U-tubes being adapted to telescope Within the open ends of the-substituted elongated sections.

Signed by me at Chicago, Illinois, this 30th day of October, 1916. DAVID A.

Witnesses:

E; H. Cnnee, AMY J EHLE.

MCDONALD;

five cents each, by addressing the Commissioner otratents, Washington, D. G. i 

